<!DOCTYPE html>



  


<html class="theme-next gemini use-motion" lang="en">
<head>
  <meta charset="UTF-8"/>
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1"/>
<meta name="theme-color" content="#222">
<script src="//cdn.bootcss.com/pace/1.0.2/pace.min.js"></script>
<link href="//cdn.bootcss.com/pace/1.0.2/themes/pink/pace-theme-flash.css" rel="stylesheet">
<style>
    .pace .pace-progress {
        background: #000000; /*进度条颜色*/
        height: 3px;
    }
    .pace .pace-progress-inner {
         box-shadow: 0 0 10px #1E92FB, 0 0 5px     #1E92FB; /*阴影颜色*/
    }
    .pace .pace-activity {
        border-top-color: #808080;    /*上边框颜色*/
        border-left-color: #808080;    /*左边框颜色*/
    }
</style>



  
  
    
    
  <script src="/lib/pace/pace.min.js?v=1.0.2"></script>
  <link href="/lib/pace/pace-theme-minimal.min.css?v=1.0.2" rel="stylesheet">







<meta http-equiv="Cache-Control" content="no-transform" />
<meta http-equiv="Cache-Control" content="no-siteapp" />
















  
  
  <link href="/lib/fancybox/source/jquery.fancybox.css?v=2.1.5" rel="stylesheet" type="text/css" />







<link href="/lib/font-awesome/css/font-awesome.min.css?v=4.6.2" rel="stylesheet" type="text/css" />

<link href="/css/main.css?v=5.1.4" rel="stylesheet" type="text/css" />


  <link rel="apple-touch-icon" sizes="180x180" href="/images/apple-touch-icon-next.png?v=5.1.4">


  <link rel="icon" type="image/png" sizes="32x32" href="/images/favicon-32x32-next.png?v=5.1.4">


  <link rel="icon" type="image/png" sizes="16x16" href="/images/favicon-16x16-next.png?v=5.1.4">


  <link rel="mask-icon" href="/images/logo.svg?v=5.1.4" color="#222">





  <meta name="keywords" content="CTF," />





  <link rel="alternate" href="/rss2.xml" title="diao-diao-UPUP" type="application/atom+xml" />






<meta name="description" content="验证码的识别随着爬虫越来越多，许多网站都采取了各种各样的反爬虫机制，其中最常见的就是使用验证码，现在随着技术的发展，验证码已经由数字演变成了字母，滑动，九宫格等各种验证码 前言由于tesserocr库是比较老的库，目前只更新到只吃python3.7，而由于我的是python3.8经过多次尝试之后，发现还是无法使用，经过查看大量的资料，我使用了另外一个库—pytesseract pytesserac">
<meta name="keywords" content="CTF">
<meta property="og:type" content="article">
<meta property="og:title" content="Python3-2020&#x2F;5&#x2F;1-周报10">
<meta property="og:url" content="http:&#x2F;&#x2F;yoursite.com&#x2F;2020&#x2F;05&#x2F;02&#x2F;Python3-2020-5-1-%E5%91%A8%E6%8A%A510&#x2F;index.html">
<meta property="og:site_name" content="diao-diao-UPUP">
<meta property="og:description" content="验证码的识别随着爬虫越来越多，许多网站都采取了各种各样的反爬虫机制，其中最常见的就是使用验证码，现在随着技术的发展，验证码已经由数字演变成了字母，滑动，九宫格等各种验证码 前言由于tesserocr库是比较老的库，目前只更新到只吃python3.7，而由于我的是python3.8经过多次尝试之后，发现还是无法使用，经过查看大量的资料，我使用了另外一个库—pytesseract pytesserac">
<meta property="og:locale" content="en">
<meta property="og:image" content="http:&#x2F;&#x2F;yoursite.com&#x2F;images&#x2F;python3&#x2F;验证码0.png">
<meta property="og:image" content="http:&#x2F;&#x2F;yoursite.com&#x2F;images&#x2F;python3&#x2F;验证码1.png">
<meta property="og:image" content="http:&#x2F;&#x2F;yoursite.com&#x2F;images&#x2F;python3&#x2F;code2.png">
<meta property="og:image" content="http:&#x2F;&#x2F;yoursite.com&#x2F;images&#x2F;python3&#x2F;test.jpg">
<meta property="og:image" content="http:&#x2F;&#x2F;yoursite.com&#x2F;images&#x2F;python3&#x2F;验证码2.png">
<meta property="og:image" content="http:&#x2F;&#x2F;yoursite.com&#x2F;images&#x2F;python3&#x2F;验证码3.png">
<meta property="og:updated_time" content="2020-05-08T01:07:41.043Z">
<meta name="twitter:card" content="summary">
<meta name="twitter:image" content="http:&#x2F;&#x2F;yoursite.com&#x2F;images&#x2F;python3&#x2F;验证码0.png">



<script type="text/javascript" id="hexo.configurations">
  var NexT = window.NexT || {};
  var CONFIG = {
    root: '/',
    scheme: 'Gemini',
    version: '5.1.4',
    sidebar: {"position":"left","display":"post","offset":12,"b2t":false,"scrollpercent":false,"onmobile":false},
    fancybox: true,
    tabs: true,
    motion: {"enable":true,"async":false,"transition":{"post_block":"fadeIn","post_header":"slideDownIn","post_body":"slideDownIn","coll_header":"slideLeftIn","sidebar":"slideUpIn"}},
    duoshuo: {
      userId: '0',
      author: 'Author'
    },
    algolia: {
      applicationID: '',
      apiKey: '',
      indexName: '',
      hits: {"per_page":10},
      labels: {"input_placeholder":"Search for Posts","hits_empty":"We didn't find any results for the search: ${query}","hits_stats":"${hits} results found in ${time} ms"}
    }
  };
</script>



  <link rel="canonical" href="http://yoursite.com/2020/05/02/Python3-2020-5-1-周报10/"/>





  <title>Python3-2020/5/1-周报10 | diao-diao-UPUP</title>
  








</head>

<body itemscope itemtype="http://schema.org/WebPage" lang="en">

  
  
    
  

  <div class="container sidebar-position-left page-post-detail">
    <div class="headband"></div>

    <header id="header" class="header" itemscope itemtype="http://schema.org/WPHeader">
      <div class="header-inner"><div class="site-brand-wrapper">
  <div class="site-meta ">
    

    <div class="custom-logo-site-title">
      <a href="/"  class="brand" rel="start">
        <span class="logo-line-before"><i></i></span>
        <span class="site-title">diao-diao-UPUP</span>
        <span class="logo-line-after"><i></i></span>
      </a>
    </div>
      
        <p class="site-subtitle">我是一只web狗</p>
      
  </div>

  <div class="site-nav-toggle">
    <button>
      <span class="btn-bar"></span>
      <span class="btn-bar"></span>
      <span class="btn-bar"></span>
    </button>
  </div>
</div>

<nav class="site-nav">
  

  
    <ul id="menu" class="menu">
      
        
        <li class="menu-item menu-item-home">
          <a href="/" rel="section">
            
              <i class="menu-item-icon fa fa-fw fa-question-circle"></i> <br />
            
            Home
          </a>
        </li>
      
        
        <li class="menu-item menu-item-about">
          <a href="/about" rel="section">
            
              <i class="menu-item-icon fa fa-fw fa-question-circle"></i> <br />
            
            About
          </a>
        </li>
      
        
        <li class="menu-item menu-item-tags">
          <a href="/tags" rel="section">
            
              <i class="menu-item-icon fa fa-fw fa-question-circle"></i> <br />
            
            Tags
          </a>
        </li>
      
        
        <li class="menu-item menu-item-categories">
          <a href="/categories" rel="section">
            
              <i class="menu-item-icon fa fa-fw fa-question-circle"></i> <br />
            
            Categories
          </a>
        </li>
      

      
        <li class="menu-item menu-item-search">
          
            <a href="javascript:;" target="_blank" rel="noopener" class="popup-trigger">
          
            
              <i class="menu-item-icon fa fa-search fa-fw"></i> <br />
            
            Search
          </a>
        </li>
      
    </ul>
  

  
    <div class="site-search">
      
  <div class="popup search-popup local-search-popup">
  <div class="local-search-header clearfix">
    <span class="search-icon">
      <i class="fa fa-search"></i>
    </span>
    <span class="popup-btn-close">
      <i class="fa fa-times-circle"></i>
    </span>
    <div class="local-search-input-wrapper">
      <input autocomplete="off"
             placeholder="Searching..." spellcheck="false"
             type="text" id="local-search-input">
    </div>
  </div>
  <div id="local-search-result"></div>
</div>



    </div>
  
</nav>



 </div>
    </header>

    <main id="main" class="main">
      <div class="main-inner">
        <div class="content-wrap">
          <div id="content" class="content">
            

  <div id="posts" class="posts-expand">
    

  

  
  
  

  <article class="post post-type-normal" itemscope itemtype="http://schema.org/Article">
  
  
  
  <div class="post-block">
    <link itemprop="mainEntityOfPage" href="http://yoursite.com/2020/05/02/Python3-2020-5-1-%E5%91%A8%E6%8A%A510/">

    <span hidden itemprop="author" itemscope itemtype="http://schema.org/Person">
      <meta itemprop="name" content="51nd0re1">
      <meta itemprop="description" content="">
      <meta itemprop="image" content="/images/header.jpg">
    </span>

    <span hidden itemprop="publisher" itemscope itemtype="http://schema.org/Organization">
      <meta itemprop="name" content="diao-diao-UPUP">
    </span>

    
      <header class="post-header">

        
        
          <h1 class="post-title" itemprop="name headline">Python3-2020/5/1-周报10</h1>
        

        <div class="post-meta">
          <span class="post-time">
            
              <span class="post-meta-item-icon">
                <i class="fa fa-calendar-o"></i>
              </span>
              
                <span class="post-meta-item-text">Posted on</span>
              
              <time title="Post created" itemprop="dateCreated datePublished" datetime="2020-05-02T08:53:51+08:00">
                2020-05-02
              </time>
            

            

            
          </span>

          
            <span class="post-category" >
            
              <span class="post-meta-divider">|</span>
            
              <span class="post-meta-item-icon">
                <i class="fa fa-folder-o"></i>
              </span>
              
                <span class="post-meta-item-text">In</span>
              
              
                <span itemprop="about" itemscope itemtype="http://schema.org/Thing">
                  <a href="/categories/%E6%97%A5%E5%B8%B8%E5%AD%A6%E4%B9%A0/" itemprop="url" rel="index">
                    <span itemprop="name">日常学习</span>
                  </a>
                </span>

                
                
                  , 
                
              
                <span itemprop="about" itemscope itemtype="http://schema.org/Thing">
                  <a href="/categories/%E6%97%A5%E5%B8%B8%E5%AD%A6%E4%B9%A0/Python3/" itemprop="url" rel="index">
                    <span itemprop="name">Python3</span>
                  </a>
                </span>

                
                
              
            </span>
          

          
            
          

          
          

          

          

          

        </div>
      </header>
    

    
    
    
    <div class="post-body" itemprop="articleBody">

      
      

      
        <h1 id="验证码的识别"><a href="#验证码的识别" class="headerlink" title="验证码的识别"></a>验证码的识别</h1><p>随着爬虫越来越多，许多网站都采取了各种各样的反爬虫机制，其中最常见的就是使用验证码，现在随着技术的发展，验证码已经由数字演变成了字母，滑动，九宫格等各种验证码</p>
<h2 id="前言"><a href="#前言" class="headerlink" title="前言"></a>前言</h2><p>由于tesserocr库是比较老的库，目前只更新到只吃python3.7，而由于我的是python3.8经过多次尝试之后，发现还是无法使用，经过查看大量的资料，我使用了另外一个库—pytesseract</p>
<p>pytesseract这个库原理几乎和tesserocr库相同</p>
<h2 id="图形验证码识别"><a href="#图形验证码识别" class="headerlink" title="图形验证码识别"></a>图形验证码识别</h2><p>我们先识别一下最简单的一种验证码，即图形验证码。这种验证码最早出现，也很常见，一般是由4位字母或者数字组成。例如<a href="http://my.cnki.net/Register/CommonRegister.aspx的登录验证码" target="_blank" rel="noopener">http://my.cnki.net/Register/CommonRegister.aspx的登录验证码</a></p>
<h3 id="获取验证码"><a href="#获取验证码" class="headerlink" title="获取验证码"></a>获取验证码</h3><p>首先需要安装pytesseract库</p>
<p>为了便于实验，我们先将验证码图片保存在本地，先测试一下</p>
<p>首先F12打开开发者工具，查看验证码的url<br><img src="/images/python3/验证码0.png" alt="avatar"></p>
<p>接下来访问一下这个aspx<br><img src="/images/python3/验证码1.png" alt="avatar"><br>由于验证码是动态的 所以也没有什么太大的关系</p>
<p>加下来把这个aspx保存下来，命名为code.png</p>
<p>代码：<br><figure class="highlight processing"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">import</span> pytesseract</span><br><span class="line">from PIL <span class="keyword">import</span> Image</span><br><span class="line"></span><br><span class="line"><span class="built_in">image</span>=Image.<span class="built_in">open</span>(<span class="string">'D:\\code.png'</span>)</span><br><span class="line"><span class="built_in">image</span>=<span class="built_in">image</span>.convert(<span class="string">'RGB'</span>)</span><br><span class="line"><span class="built_in">print</span>(pytesseract.image_to_string(<span class="built_in">image</span>))</span><br><span class="line"></span><br><span class="line">输出结果：</span><br><span class="line">Gsee</span><br></pre></td></tr></table></figure></p>
<p>这里新建了一个Image对象，调用了pytesseract的image_to_string()方法，传入该对象即可完成识别，但是要注意的是，由于pytesseract的特殊性，处理图片时，由于图片可能不是RGBA通路的，所以最后在打开图片后等增加image.convert(‘RGB’)语句，保证图片是RGB格式的</p>
<h3 id="验证码处理"><a href="#验证码处理" class="headerlink" title="验证码处理"></a>验证码处理</h3><p>接下来我们换一个验证码，命名为code2.png<br><img src="/images/python3/code2.png" alt="avatar"></p>
<p>重新用以下代码来测试：<br><figure class="highlight processing"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">import</span> pytesseract</span><br><span class="line">from PIL <span class="keyword">import</span> Image</span><br><span class="line"></span><br><span class="line"><span class="built_in">image</span>=Image.<span class="built_in">open</span>(<span class="string">'D:\\code2.png'</span>)</span><br><span class="line"><span class="built_in">image</span>=<span class="built_in">image</span>.convert(<span class="string">'RGB'</span>)</span><br><span class="line"><span class="built_in">print</span>(pytesseract.image_to_string(<span class="built_in">image</span>))</span><br></pre></td></tr></table></figure><br>我刷新的这个验证码并没有出现偏差，但是例如<br><img src="/images/python3/test.jpg" alt="avatar"><br>就会出现偏差<br><figure class="highlight processing"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">import</span> pytesseract</span><br><span class="line">from PIL <span class="keyword">import</span> Image</span><br><span class="line"></span><br><span class="line"><span class="built_in">image</span>=Image.<span class="built_in">open</span>(<span class="string">'D:\\test.jpg'</span>)</span><br><span class="line"><span class="built_in">image</span>=<span class="built_in">image</span>.convert(<span class="string">'RGB'</span>)</span><br><span class="line"><span class="built_in">print</span>(pytesseract.image_to_string(<span class="built_in">image</span>))</span><br><span class="line"></span><br><span class="line">输出结果：</span><br><span class="line">thye</span><br></pre></td></tr></table></figure><br>这个时候，其实是因为验证码多余的线条干扰了图片的识别，我们在这里还需要进行额外的处理，如转灰度，二值化等操作</p>
<p>我们可以利用Image对象的convert()方法传入L，即可将图片转为灰度图像<br><figure class="highlight maxima"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line"><span class="built_in">image</span>=<span class="built_in">image</span>.<span class="built_in">convert</span>('L')</span><br><span class="line"><span class="built_in">image</span>.<span class="built_in">show</span>()</span><br></pre></td></tr></table></figure><br><img src="/images/python3/验证码2.png" alt="avatar"></p>
<p>这样就成功将其灰度化</p>
<p>传入1即可将图片进行二值化处理<br><figure class="highlight maxima"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line"><span class="built_in">image</span>=<span class="built_in">image</span>.<span class="built_in">convert</span>('<span class="number">1</span>')</span><br><span class="line"><span class="built_in">image</span>.<span class="built_in">show</span>()</span><br></pre></td></tr></table></figure><br>我们还可以指定二值化的阈值，上面的方法默认采用的是127.不过我们不能直接转换，需要将图片先灰度化，然后化再指定阈值<br><figure class="highlight maxima"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br></pre></td><td class="code"><pre><span class="line"><span class="built_in">image</span>=<span class="built_in">image</span>.<span class="built_in">convert</span>('L')</span><br><span class="line">threshold=<span class="number">110</span></span><br><span class="line">table=[]</span><br><span class="line"><span class="keyword">for</span> i <span class="keyword">in</span> <span class="built_in">range</span>(<span class="number">256</span>):</span><br><span class="line">    <span class="keyword">if</span> i&lt;threshold:</span><br><span class="line">        table.<span class="built_in">append</span>(<span class="number">0</span>)</span><br><span class="line">    <span class="keyword">else</span>:</span><br><span class="line">        table.<span class="built_in">append</span>(<span class="number">1</span>)</span><br><span class="line"><span class="built_in">image</span>=<span class="built_in">image</span>.point(table,'<span class="number">1</span>')</span><br><span class="line"><span class="built_in">image</span>.<span class="built_in">show</span>()</span><br></pre></td></tr></table></figure><br><img src="/images/python3/验证码3.png" alt="avatar"><br>这里将阈值调整为110 图片中的内容才能显示完成，阈值的值是根据验证码的情况来确定的，并不是一个定值</p>
<p>我们看到经过处理之后的验证码，线条已经被去除，验证码变得黑白分明，这个时候才重新识别验证码<br><figure class="highlight processing"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">import</span> pytesseract</span><br><span class="line">from PIL <span class="keyword">import</span> Image</span><br><span class="line"></span><br><span class="line"><span class="built_in">image</span>=Image.<span class="built_in">open</span>(<span class="string">'D:\\test.png'</span>)</span><br><span class="line"><span class="built_in">image</span>=<span class="built_in">image</span>.convert(<span class="string">'RGB'</span>)</span><br><span class="line"><span class="built_in">image</span>=<span class="built_in">image</span>.convert(<span class="string">'L'</span>)</span><br><span class="line">threshold=<span class="number">110</span></span><br><span class="line">table=[]</span><br><span class="line"><span class="keyword">for</span> i in range(<span class="number">256</span>):</span><br><span class="line">    <span class="keyword">if</span> i&lt;threshold:</span><br><span class="line">        table.<span class="built_in">append</span>(<span class="number">0</span>)</span><br><span class="line">    <span class="keyword">else</span>:</span><br><span class="line">        table.<span class="built_in">append</span>(<span class="number">1</span>)</span><br><span class="line"><span class="built_in">image</span>=<span class="built_in">image</span>.<span class="built_in">point</span>(table,<span class="string">'1'</span>)</span><br><span class="line"><span class="built_in">print</span>(pytesseract.image_to_string(<span class="built_in">image</span>))</span><br><span class="line"></span><br><span class="line">输出结果：</span><br><span class="line">fhYe</span><br></pre></td></tr></table></figure><br>针对一些有干扰的图片，我们就可以做一些灰度和二值化的处理，以此来提高图片的正确率</p>
<h1 id="总结"><a href="#总结" class="headerlink" title="总结"></a>总结</h1><p>1.tesseror库比较过时，而且版本更新较慢，目前只支持到了python3.7的版本</p>
<p>2.由于tesseror库无法使用，所以采用了pytesseract库，但是由于pytesseract库的特性，只会识别RGB通道的图片，所以需要在每条语句的后面都添加上image.convert(‘RGB’)</p>
<p>3.文字验证码较为简单，但是会有一些斑点或线条等进行干扰，所以需要采用灰度和二值化来进行处理</p>
<p>4.二值化处理之前需要先进行灰度化的处理，并且每个图片需要设置的阈值可能会不同，阈值不是一个定值，需要经常进行更换</p>

      
    </div>
    
    
    

    

    

    

    <footer class="post-footer">
      
        <div class="post-tags">
          
            <a href="/tags/CTF/" rel="tag"># CTF</a>
          
        </div>
      

      
      
      

      
        <div class="post-nav">
          <div class="post-nav-next post-nav-item">
            
              <a href="/2020/04/26/Python3-2020-4-26-%E5%91%A8%E6%8A%A59/" rel="next" title="Python3-2020/4/26-周报9">
                <i class="fa fa-chevron-left"></i> Python3-2020/4/26-周报9
              </a>
            
          </div>

          <span class="post-nav-divider"></span>

          <div class="post-nav-prev post-nav-item">
            
              <a href="/2020/05/08/BUUCTF-Nepnep-0/" rel="prev" title="BUUCTF-Nepnep-0">
                BUUCTF-Nepnep-0 <i class="fa fa-chevron-right"></i>
              </a>
            
          </div>
        </div>
      

      
      
    </footer>
  </div>
  
  
  
  </article>



    <div class="post-spread">
      
    </div>
  </div>


          </div>
          


          

  



        </div>
        
          
  
  <div class="sidebar-toggle">
    <div class="sidebar-toggle-line-wrap">
      <span class="sidebar-toggle-line sidebar-toggle-line-first"></span>
      <span class="sidebar-toggle-line sidebar-toggle-line-middle"></span>
      <span class="sidebar-toggle-line sidebar-toggle-line-last"></span>
    </div>
  </div>

  <aside id="sidebar" class="sidebar">
    
    <div class="sidebar-inner">

      

      
        <ul class="sidebar-nav motion-element">
          <li class="sidebar-nav-toc sidebar-nav-active" data-target="post-toc-wrap">
            Table of Contents
          </li>
          <li class="sidebar-nav-overview" data-target="site-overview-wrap">
            Overview
          </li>
        </ul>
      

      <section class="site-overview-wrap sidebar-panel">
        <div class="site-overview">
          <div class="site-author motion-element" itemprop="author" itemscope itemtype="http://schema.org/Person">
            
              <img class="site-author-image" itemprop="image"
                src="/images/header.jpg"
                alt="51nd0re1" />
            
              <p class="site-author-name" itemprop="name">51nd0re1</p>
              <p class="site-description motion-element" itemprop="description"></p>
          </div>

          <nav class="site-state motion-element">

            
              <div class="site-state-item site-state-posts">
              
                <a href="/archives">
              
                  <span class="site-state-item-count">43</span>
                  <span class="site-state-item-name">posts</span>
                </a>
              </div>
            

            
              
              
              <div class="site-state-item site-state-categories">
                <a href="/categories/index.html">
                  <span class="site-state-item-count">4</span>
                  <span class="site-state-item-name">categories</span>
                </a>
              </div>
            

            
              
              
              <div class="site-state-item site-state-tags">
                <a href="/tags/index.html">
                  <span class="site-state-item-count">2</span>
                  <span class="site-state-item-name">tags</span>
                </a>
              </div>
            

          </nav>

          
            <div class="feed-link motion-element">
              <a href="/rss2.xml" rel="alternate">
                <i class="fa fa-rss"></i>
                RSS
              </a>
            </div>
          

          
            <div class="links-of-author motion-element">
                
                  <span class="links-of-author-item">
                    <a href="https://github.com/diao-diao" target="_blank" title="GitHub">
                      
                        <i class="fa fa-fw fa-github"></i>GitHub</a>
                  </span>
                
                  <span class="links-of-author-item">
                    <a href="mailto:302684932@qq.com" target="_blank" title="E-Mail">
                      
                        <i class="fa fa-fw fa-envelope"></i>E-Mail</a>
                  </span>
                
            </div>
          

          
          

          
          
            <div class="links-of-blogroll motion-element links-of-blogroll-block">
              <div class="links-of-blogroll-title">
                <i class="fa  fa-fw fa-link"></i>
                友情链接
              </div>
              <ul class="links-of-blogroll-list">
                
                  <li class="links-of-blogroll-item">
                    <a href="https://l0x1c.github.io/" title="L0x1c" target="_blank">L0x1c</a>
                  </li>
                
                  <li class="links-of-blogroll-item">
                    <a href="https://15h3na0.xyz/" title="15h3na0" target="_blank">15h3na0</a>
                  </li>
                
                  <li class="links-of-blogroll-item">
                    <a href="https://p3rh4ps.top/" title="p3rh4ps" target="_blank">p3rh4ps</a>
                  </li>
                
                  <li class="links-of-blogroll-item">
                    <a href="https://www.cnblogs.com/yesec/" title="yesec" target="_blank">yesec</a>
                  </li>
                
                  <li class="links-of-blogroll-item">
                    <a href="https://ch4ser-go.github.io/" title="ch4ser" target="_blank">ch4ser</a>
                  </li>
                
                  <li class="links-of-blogroll-item">
                    <a href="http://www.ggb0n.cool/" title="ggb0n" target="_blank">ggb0n</a>
                  </li>
                
                  <li class="links-of-blogroll-item">
                    <a href="http://github.mrkaixin.computer/" title="mrkaixin" target="_blank">mrkaixin</a>
                  </li>
                
                  <li class="links-of-blogroll-item">
                    <a href="https://imagin.vip/" title="imagin" target="_blank">imagin</a>
                  </li>
                
              </ul>
            </div>
          

          

        </div>
      </section>

      
      <!--noindex-->
        <section class="post-toc-wrap motion-element sidebar-panel sidebar-panel-active">
          <div class="post-toc">

            
              
            

            
              <div class="post-toc-content"><ol class="nav"><li class="nav-item nav-level-1"><a class="nav-link" href="#验证码的识别"><span class="nav-number">1.</span> <span class="nav-text">验证码的识别</span></a><ol class="nav-child"><li class="nav-item nav-level-2"><a class="nav-link" href="#前言"><span class="nav-number">1.1.</span> <span class="nav-text">前言</span></a></li><li class="nav-item nav-level-2"><a class="nav-link" href="#图形验证码识别"><span class="nav-number">1.2.</span> <span class="nav-text">图形验证码识别</span></a><ol class="nav-child"><li class="nav-item nav-level-3"><a class="nav-link" href="#获取验证码"><span class="nav-number">1.2.1.</span> <span class="nav-text">获取验证码</span></a></li><li class="nav-item nav-level-3"><a class="nav-link" href="#验证码处理"><span class="nav-number">1.2.2.</span> <span class="nav-text">验证码处理</span></a></li></ol></li></ol></li><li class="nav-item nav-level-1"><a class="nav-link" href="#总结"><span class="nav-number">2.</span> <span class="nav-text">总结</span></a></li></ol></div>
            

          </div>
        </section>
      <!--/noindex-->
      

      

    </div>
  </aside>


        
      </div>
    </main>

    <footer id="footer" class="footer">
      <div class="footer-inner">
        <div class="copyright">&copy; <span itemprop="copyrightYear">2020</span>
  <span class="with-love">
    <i class="fa fa-user"></i>
  </span>
  <span class="author" itemprop="copyrightHolder">51nd0re1</span>

  
</div>


  <div class="powered-by">Powered by <a class="theme-link" target="_blank" href="https://hexo.io">Hexo</a></div>



  <span class="post-meta-divider">|</span>



  <div class="theme-info">Theme &mdash; <a class="theme-link" target="_blank" href="https://github.com/iissnan/hexo-theme-next">NexT.Gemini</a> v5.1.4</div>




        







        
      </div>
    </footer>

    
      <div class="back-to-top">
        <i class="fa fa-arrow-up"></i>
        
      </div>
    

    

  </div>

  

<script type="text/javascript">
  if (Object.prototype.toString.call(window.Promise) !== '[object Function]') {
    window.Promise = null;
  }
</script>









  


  











  
  
    <script type="text/javascript" src="/lib/jquery/index.js?v=2.1.3"></script>
  

  
  
    <script type="text/javascript" src="/lib/fastclick/lib/fastclick.min.js?v=1.0.6"></script>
  

  
  
    <script type="text/javascript" src="/lib/jquery_lazyload/jquery.lazyload.js?v=1.9.7"></script>
  

  
  
    <script type="text/javascript" src="/lib/velocity/velocity.min.js?v=1.2.1"></script>
  

  
  
    <script type="text/javascript" src="/lib/velocity/velocity.ui.min.js?v=1.2.1"></script>
  

  
  
    <script type="text/javascript" src="/lib/fancybox/source/jquery.fancybox.pack.js?v=2.1.5"></script>
  

  
  
    <script type="text/javascript" src="/lib/canvas-nest/canvas-nest.min.js"></script>
  


  


  <script type="text/javascript" src="/js/src/utils.js?v=5.1.4"></script>

  <script type="text/javascript" src="/js/src/motion.js?v=5.1.4"></script>



  
  


  <script type="text/javascript" src="/js/src/affix.js?v=5.1.4"></script>

  <script type="text/javascript" src="/js/src/schemes/pisces.js?v=5.1.4"></script>



  
  <script type="text/javascript" src="/js/src/scrollspy.js?v=5.1.4"></script>
<script type="text/javascript" src="/js/src/post-details.js?v=5.1.4"></script>



  


  <script type="text/javascript" src="/js/src/bootstrap.js?v=5.1.4"></script>



  


  




	





  





  












  

  <script type="text/javascript">
    // Popup Window;
    var isfetched = false;
    var isXml = true;
    // Search DB path;
    var search_path = "search.xml";
    if (search_path.length === 0) {
      search_path = "search.xml";
    } else if (/json$/i.test(search_path)) {
      isXml = false;
    }
    var path = "/" + search_path;
    // monitor main search box;

    var onPopupClose = function (e) {
      $('.popup').hide();
      $('#local-search-input').val('');
      $('.search-result-list').remove();
      $('#no-result').remove();
      $(".local-search-pop-overlay").remove();
      $('body').css('overflow', '');
    }

    function proceedsearch() {
      $("body")
        .append('<div class="search-popup-overlay local-search-pop-overlay"></div>')
        .css('overflow', 'hidden');
      $('.search-popup-overlay').click(onPopupClose);
      $('.popup').toggle();
      var $localSearchInput = $('#local-search-input');
      $localSearchInput.attr("autocapitalize", "none");
      $localSearchInput.attr("autocorrect", "off");
      $localSearchInput.focus();
    }

    // search function;
    var searchFunc = function(path, search_id, content_id) {
      'use strict';

      // start loading animation
      $("body")
        .append('<div class="search-popup-overlay local-search-pop-overlay">' +
          '<div id="search-loading-icon">' +
          '<i class="fa fa-spinner fa-pulse fa-5x fa-fw"></i>' +
          '</div>' +
          '</div>')
        .css('overflow', 'hidden');
      $("#search-loading-icon").css('margin', '20% auto 0 auto').css('text-align', 'center');

      $.ajax({
        url: path,
        dataType: isXml ? "xml" : "json",
        async: true,
        success: function(res) {
          // get the contents from search data
          isfetched = true;
          $('.popup').detach().appendTo('.header-inner');
          var datas = isXml ? $("entry", res).map(function() {
            return {
              title: $("title", this).text(),
              content: $("content",this).text(),
              url: $("url" , this).text()
            };
          }).get() : res;
          var input = document.getElementById(search_id);
          var resultContent = document.getElementById(content_id);
          var inputEventFunction = function() {
            var searchText = input.value.trim().toLowerCase();
            var keywords = searchText.split(/[\s\-]+/);
            if (keywords.length > 1) {
              keywords.push(searchText);
            }
            var resultItems = [];
            if (searchText.length > 0) {
              // perform local searching
              datas.forEach(function(data) {
                var isMatch = false;
                var hitCount = 0;
                var searchTextCount = 0;
                var title = data.title.trim();
                var titleInLowerCase = title.toLowerCase();
                var content = data.content.trim().replace(/<[^>]+>/g,"");
                var contentInLowerCase = content.toLowerCase();
                var articleUrl = decodeURIComponent(data.url);
                var indexOfTitle = [];
                var indexOfContent = [];
                // only match articles with not empty titles
                if(title != '') {
                  keywords.forEach(function(keyword) {
                    function getIndexByWord(word, text, caseSensitive) {
                      var wordLen = word.length;
                      if (wordLen === 0) {
                        return [];
                      }
                      var startPosition = 0, position = [], index = [];
                      if (!caseSensitive) {
                        text = text.toLowerCase();
                        word = word.toLowerCase();
                      }
                      while ((position = text.indexOf(word, startPosition)) > -1) {
                        index.push({position: position, word: word});
                        startPosition = position + wordLen;
                      }
                      return index;
                    }

                    indexOfTitle = indexOfTitle.concat(getIndexByWord(keyword, titleInLowerCase, false));
                    indexOfContent = indexOfContent.concat(getIndexByWord(keyword, contentInLowerCase, false));
                  });
                  if (indexOfTitle.length > 0 || indexOfContent.length > 0) {
                    isMatch = true;
                    hitCount = indexOfTitle.length + indexOfContent.length;
                  }
                }

                // show search results

                if (isMatch) {
                  // sort index by position of keyword

                  [indexOfTitle, indexOfContent].forEach(function (index) {
                    index.sort(function (itemLeft, itemRight) {
                      if (itemRight.position !== itemLeft.position) {
                        return itemRight.position - itemLeft.position;
                      } else {
                        return itemLeft.word.length - itemRight.word.length;
                      }
                    });
                  });

                  // merge hits into slices

                  function mergeIntoSlice(text, start, end, index) {
                    var item = index[index.length - 1];
                    var position = item.position;
                    var word = item.word;
                    var hits = [];
                    var searchTextCountInSlice = 0;
                    while (position + word.length <= end && index.length != 0) {
                      if (word === searchText) {
                        searchTextCountInSlice++;
                      }
                      hits.push({position: position, length: word.length});
                      var wordEnd = position + word.length;

                      // move to next position of hit

                      index.pop();
                      while (index.length != 0) {
                        item = index[index.length - 1];
                        position = item.position;
                        word = item.word;
                        if (wordEnd > position) {
                          index.pop();
                        } else {
                          break;
                        }
                      }
                    }
                    searchTextCount += searchTextCountInSlice;
                    return {
                      hits: hits,
                      start: start,
                      end: end,
                      searchTextCount: searchTextCountInSlice
                    };
                  }

                  var slicesOfTitle = [];
                  if (indexOfTitle.length != 0) {
                    slicesOfTitle.push(mergeIntoSlice(title, 0, title.length, indexOfTitle));
                  }

                  var slicesOfContent = [];
                  while (indexOfContent.length != 0) {
                    var item = indexOfContent[indexOfContent.length - 1];
                    var position = item.position;
                    var word = item.word;
                    // cut out 100 characters
                    var start = position - 20;
                    var end = position + 80;
                    if(start < 0){
                      start = 0;
                    }
                    if (end < position + word.length) {
                      end = position + word.length;
                    }
                    if(end > content.length){
                      end = content.length;
                    }
                    slicesOfContent.push(mergeIntoSlice(content, start, end, indexOfContent));
                  }

                  // sort slices in content by search text's count and hits' count

                  slicesOfContent.sort(function (sliceLeft, sliceRight) {
                    if (sliceLeft.searchTextCount !== sliceRight.searchTextCount) {
                      return sliceRight.searchTextCount - sliceLeft.searchTextCount;
                    } else if (sliceLeft.hits.length !== sliceRight.hits.length) {
                      return sliceRight.hits.length - sliceLeft.hits.length;
                    } else {
                      return sliceLeft.start - sliceRight.start;
                    }
                  });

                  // select top N slices in content

                  var upperBound = parseInt('1');
                  if (upperBound >= 0) {
                    slicesOfContent = slicesOfContent.slice(0, upperBound);
                  }

                  // highlight title and content

                  function highlightKeyword(text, slice) {
                    var result = '';
                    var prevEnd = slice.start;
                    slice.hits.forEach(function (hit) {
                      result += text.substring(prevEnd, hit.position);
                      var end = hit.position + hit.length;
                      result += '<b class="search-keyword">' + text.substring(hit.position, end) + '</b>';
                      prevEnd = end;
                    });
                    result += text.substring(prevEnd, slice.end);
                    return result;
                  }

                  var resultItem = '';

                  if (slicesOfTitle.length != 0) {
                    resultItem += "<li><a href='" + articleUrl + "' class='search-result-title'>" + highlightKeyword(title, slicesOfTitle[0]) + "</a>";
                  } else {
                    resultItem += "<li><a href='" + articleUrl + "' class='search-result-title'>" + title + "</a>";
                  }

                  slicesOfContent.forEach(function (slice) {
                    resultItem += "<a href='" + articleUrl + "'>" +
                      "<p class=\"search-result\">" + highlightKeyword(content, slice) +
                      "...</p>" + "</a>";
                  });

                  resultItem += "</li>";
                  resultItems.push({
                    item: resultItem,
                    searchTextCount: searchTextCount,
                    hitCount: hitCount,
                    id: resultItems.length
                  });
                }
              })
            };
            if (keywords.length === 1 && keywords[0] === "") {
              resultContent.innerHTML = '<div id="no-result"><i class="fa fa-search fa-5x" /></div>'
            } else if (resultItems.length === 0) {
              resultContent.innerHTML = '<div id="no-result"><i class="fa fa-frown-o fa-5x" /></div>'
            } else {
              resultItems.sort(function (resultLeft, resultRight) {
                if (resultLeft.searchTextCount !== resultRight.searchTextCount) {
                  return resultRight.searchTextCount - resultLeft.searchTextCount;
                } else if (resultLeft.hitCount !== resultRight.hitCount) {
                  return resultRight.hitCount - resultLeft.hitCount;
                } else {
                  return resultRight.id - resultLeft.id;
                }
              });
              var searchResultList = '<ul class=\"search-result-list\">';
              resultItems.forEach(function (result) {
                searchResultList += result.item;
              })
              searchResultList += "</ul>";
              resultContent.innerHTML = searchResultList;
            }
          }

          if ('auto' === 'auto') {
            input.addEventListener('input', inputEventFunction);
          } else {
            $('.search-icon').click(inputEventFunction);
            input.addEventListener('keypress', function (event) {
              if (event.keyCode === 13) {
                inputEventFunction();
              }
            });
          }

          // remove loading animation
          $(".local-search-pop-overlay").remove();
          $('body').css('overflow', '');

          proceedsearch();
        }
      });
    }

    // handle and trigger popup window;
    $('.popup-trigger').click(function(e) {
      e.stopPropagation();
      if (isfetched === false) {
        searchFunc(path, 'local-search-input', 'local-search-result');
      } else {
        proceedsearch();
      };
    });

    $('.popup-btn-close').click(onPopupClose);
    $('.popup').click(function(e){
      e.stopPropagation();
    });
    $(document).on('keyup', function (event) {
      var shouldDismissSearchPopup = event.which === 27 &&
        $('.search-popup').is(':visible');
      if (shouldDismissSearchPopup) {
        onPopupClose();
      }
    });
  </script>





  

  

  

  
  

  
  


  

  

  
  <!-- 页面点击小红心 -->
<script type="text/javascript" src="/js/src/clicklove.js"></script>

</body>
</html>
